Humanity left childhood and entered the troubled but productive world when it started to criticize its own certainties and weigh the worthiness of its most secure beliefs. Thus began that "Long Debate" on the nature of truth, the scale of real values, the life one should aspire to live, the character of justice, the sources of law, the terms of civic and political life—the good, the better, the best.

The medieval era was a watershed in Western history. This was a time of extraordinary advances in numerous fields of knowledge ranging from philosophy and theology to science, medicine, literature, and economics—as well as of revolutionary developments in education and the birth of the university. In its effects, this fascinating epoch was not only a time of great innovation, it was the era in which the seeds of the modern West were sown.

No great civilization continues to speak to us like that of ancient Egypt. But what is it about this ancient civilization that still captures our imaginations? What made Egypt special, allowing it to grow, in Professor Bob Brier's words, "from a scattering of villages across the Nile to the greatest power the world had ever seen"?

Classical physics is about how things move, why they move, and how they work. It's about making sense of motion, gravity, light, heat, sound, electricity, and magnetism, and seeing how these phenomena interweave to create the rich tapestry of everyday experience.

If you've ever wanted to delve more deeply into the mysteries of human emotion, perception, and cognition, and of why we do what we do, this course offers a superb place to start. As you hear these lectures, you hear the entire history of psychology unfold. And you learn that the subject most of us today associate with names like Sigmund Freud, Carl Jung, and B. F. Skinner really began thousands of years earlier.

There is a hidden order in the ceaselessly changing world around us. It's called classical physics, and it's about how the world is put together. Classical physics is about how things move, why they move, and how they work. It's about making sense of motion, gravity, light, heat, sound, electricity, and magnetism, and seeing how these phenomena interweave to create the rich tapestry of everyday experience.